D4125: narrow: add '--extend' flag to tracked command

[durin42 (Augie Fackler)]

durin42 accepted this revision as: durin42.
durin42 added a subscriber: martinvonz.
durin42 added a comment.


  Seems fine to me, though thinking we should probably spend some time to make sure the sparse and narrow patterns are cross-compatible like this change seems to hope for.
  
  @martinvonz maybe take a look at this with @pulkit when you're back?

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D4125

To: pulkit, durin42, #hg-reviewers
Cc: martinvonz, mercurial-devel